Coffee-roaster.



R. BURNS.

COFFEE RDASTER.

APPLICATION FILED AUG. 21, 1914.

Patented Feb. 9, 1915.

3 SHEETSSHBET 1.

5 Woe n ce c 5050i Burms $331 Clitozwz R. BURNS. COFFEE ROASTER.

APPLICATION FILED AUG. 21, 1914.

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COFFEE ROASTER.

APPLIOATION FILED AUG. 21, 1914- m m Patented Feb. 9, 1915.

3 SHEETS-SHEET 3.

ROBERT BURNS, F

NEW YORK, 1v. Y., AssIGuon fro JABEZ minus & sous, or NEW YORK, 1v. Y4,A conronn'rrou or NEW roan COFFEE-ROASTER.

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T all whom. it may concern:

Be it known that I, ROBERT BURNS, a

citizen of the United States, residing at New York, county of New York,and State of New York, have invented-new and useful Improvements inCoffee Roasters, of which the following is a specification.

This invention relates essentially to that class of coffee roasters inwhich-a revolving perforated drum is designed to contain the coffeebeans for roasting.

The fundamental object of the invention is, to provide the drum with aheat generator foiyconcentrating the heat radiated by the generator intotheinterior of the drum, and means for deflecting or shedding thematerial from the generator so that none'of the material will actuallyget into direct contact with the flame of the generator and i to burningthereof will thereby be avoided.

The invention is more fully described in the following specification andclaims and illustrated in the accompanying drawing in which:

Figure 1 is a longitudinal vertical section of a coffee roasterembodying this invention. Fig. 2 is an end view of the same. Fig. 3 is avertical transverse section in the plane m a Fig. 1. p

. In this drawing the letter a. designates a pair of end frames providedwith legs for supporting the frames. These frames are fastened togetherby means. of bolts 6 extending longitudinally from one frame to theother. Each side portion of the frame is covered by a sheet metal casingc secured to the frame, while doors 6 swingingly mounted on the casingswill give access to the interior of the casing. Each frame a is providedwith an opening f for the insertion of a dish shaped disk g. The disk isheld in a stationary position by bolts 72, in engagement with theframes; A drum 6 has end members i mounted concentrically on the disks.The cylindrical inclosing portion of the drum is perforated for thechaff to drop through. The drum-is revolved by the usual gear ring isengaged by a pinion m and driven by means of the ordinary fast and loosepulleys n. The drum.

carries segments of Babbitt metal 0 to give anti-frictional bearing withthe frame. Oil

reservoirs 79 arranged 'on the frameswith inlets Q will s pply thedesired'lubrication to the bearings of the specification of LettersPatent.

Application filed August 21, 1914. Serial IlTo. 857,815.

C blades u for carrying perforations in the drum.

ratemearen. a, 119115.

One of the disks 9 has an opening covered by a'removable screen rserving as a sight opening to observe the interior of the drum.

The screen can be removedat any time to give access to the interior ofthe drum. The other disk also has an opening 8 coactmg with a swingingchute t. This chute can be set to act as an inlet for feeding the maalsoas a door to close the opening, asshown in U. S. Patent 661,847 grantedto me N 0- vember 13th, 1900.

In the drum are arranged helical lifting bottom drum.

A deflector o is arranged in the drum. This deflector is secured to thedisks and it is hip or roof shaped in cross section as indicated in Fig.3, so as to shed the material. The deflector extends longitudinallyalong the interior above one end of it isprovided with 2. depending tothe top by the rotation of the terial into the drum, also as an outlet,and

the beans from the the axis of the drum and perforated member 111, thefunction of which will be hereinafter described.

A heat generator consisting of a gas burner tube 10 is situated belowthe deflector. This tube projects through one of the disks 9 and it hasa series of perforations 11 located along the tube to constituteburners. A fuel preferably gas is fedunder pressure into a pipe 12, andthe required proportion of air to mix with'the gas is sucked into abranch pipe T3 connected to the gas inlet.

Valves 14. mounted onthe respective pipes control theair and gas inlets.The air inlet pipe can be connected to a blower for furnishing theproper amount of air to mix with the gas, thereby giving a blue flame atthe burner openings.

The upper portion of. the frames and side casings are covered by a sheetmetal hood 15 havinga door-16 to give access to the hood and the top ofthe drum. This hood has mountedonit a chimney or flue 17 provided with adamper. 18 to regulate the draft. The damper is operated by means of ahand Wheel having pinion 19 in engage 'ment with a rack 20'flxed to thedamper. A suction device can be connected to the chimney in order toinduce a forced draft.

Below-the drum between the frames is placed a pan 21 for holding thechaff which peelsv from the beans and falls through the \Vhen the chuteis swung downwardly to feed the material into the drum, it partlyuncovers the opening 5*, thus givmgaccess to the burner tube. Thedepending member w of the deflector shields the end of the burner tubeso that none of the beans will get into lateral contact therewith, andclogging of the space between the tube and shield is obviated. At thesame time the perforations in the member 10 permit a personto observewhen the flame is properly regulated.

It will be. readily understood that when the drum is rotated, theconvoluted. blade will carry the'beansupward and drop them on to theshelved deflector where they will roll ofl and'again gravitate to thebottom of the drum. The material is thus kept in constant' action by therevolving drum and by reason of the intense heat generated by 'theburner tube all portions of the beans in the drum will be thoroughlybrowned.

Modifications of the invention may be made for instance: the inventioncould be utilized for roasting cereals by merely having smallerperforations in the drum.

- I claim:

1. In a coflee roaster the combination with a revolving drum, of a heatgenerator including means for burning a combustible located in the drum,and means for deflecting thematerial from the flame of the gen-..

' terial.

4. In a coffee roaster the combination with a revolving perforated drumprovided with lifting blades, of a heat generator including means forburning acombustible located in the drum, and angular means arrangedover the generator for deflecting the flame of the combustible from thedescend ing material.

5. In a coffee roaster the combination with a revolving perforated drumprovided with lifting blades, of a heat generator including means forburning a combustible located in the drum, and a hip shaped deflectordisposed over the flame from the combustible of the generator.

6. In a coffee roaster the combination with a revolving perforated-drumprovided with lifting blades, of a heat generator including means forburning a combustible located in the drum, a hip shaped deflectordisposed over the flame from the combustible of the -genei'ator, and achimney communicating with the drum.

7. In a coffee roaster the combination Wit a pair of stationary disksprovided with a revolving perforated drum having lifting blades, of aburner tube projecting through one of the disks into the drum, a hipshaped deflector arranged over the burner tube, and a chimneycommunicating with the drum.

8. In a coffee roaster the combination with a pair of stationary disks,a rotary per forated' drum having lifting blades mounted on the disks,of a gas burner tube projecting through one of the disks longitudinallyinto the drum, a hip shaped deflector arranged over the burner tube andsecured to the disks, and a chimney communicating witnesses.

. ROBERT BURNS. \Vitnesses 1 CHRISTIAN H. ALMSTAEDT,

HAZEL V. MCELROY.

